Back to EveryPatent.com
United States Patent | 5,199,246 |
Rodrigo | April 6, 1993 |
Electrostatic method and apparatus for opening liners within containers and maintaining such liners in spread apart disposition preparatory to filling comprises (1) A.C. electrostatic ionizing means for directing a stream of bipolar air ions toward the outer walls of the containers substantially symmetrical therewith, and (2) D.C. electrostatic charging means for directing an ion wind of a single polarity toward the interior of liners within the containers whereby the liners and the containers will be charged to opposite polarities to cause electrostatic pinning of the liners to the interior of the containers and effect opening thereof while the net charge on the package is substantially neutral. Subsequent to opening, the spread apart liners in the containers may be easily filled with the appropriate material.
Inventors: | Rodrigo; Richard D. (Line Lexington, PA) |
Assignee: | Illinois Tool Works Inc. (Glenview, IL) |
Appl. No.: | 941796 |
Filed: | September 8, 1992 |
Current U.S. Class: | 53/449; 53/141; 53/175; 53/384.1; 53/457; 53/459; 156/273.1; 493/100 |
Intern'l Class: | B31B 007/00; B65B 043/26; B65B 061/00 |
Field of Search: | 53/175,141,457,459,384.1,410,449,457 493/100,101,93,933 156/273.1,273.9,274.4,274.6,380.2,380.5 |
2328798 | Sep., 1943 | Gardner | 53/175. |
2815621 | Dec., 1957 | Carter | 493/101. |
3448000 | Jun., 1969 | Paquin et al. | 156/274. |
3462909 | Aug., 1941 | Anderson | 53/141. |
4089255 | May., 1978 | Akoh et al. | 53/175. |
4419855 | Dec., 1983 | Shanklin | 156/273. |
4824425 | Apr., 1989 | Stock | 156/273. |
4945709 | Aug., 1990 | Cerf | 53/141. |
5116444 | May., 1992 | Fox | 156/273. |